Than all other bs aside - that’s cool. Just be a good dad for him. So many kids don’t even have a dad present in their life.
If he cared about his son he wouldn't be blasting gear, eating sloppy and he'd take all his prescribed meds to treat his numerous health issues.
He doesn't care about being around to see his son grow up, he only cares about himself.
He confuses how having a son makes him feel with being an awesome father who loves being around his son. His relationship with his son is purely selfish as it's only for his benefit, not his kids.